Pump



Patented Sept. 19,-1933 PUIWP Charles G. Boone, Tulsa, Okla., assignor to Magic City Specialty Company, Tulsa, Okla., a corporation of Oklahoma Application April 12, 1932. Serial No. 604,822

5 Claims.

This invention relatesto deep well pumps and particularly to pumps operated by a fluid motor positioned in'the well and preferably adjacent to the pump.

The object of the invention is to simplify and to improve generally deep well pumps of this character.

Referring to the accompanying drawing, which is made a part hereof and on whichsimilar reference characters indicate similar parts,

Figure 1 is avertical section of a pump, motor and operating valves, and

Figure 2, a vertical section of a modified form of the, invention.

In the drawing numeral 10 indicates a pump casing which may be suitably secured to the lower end of a string of pipe 11. The lower end of the casing 10 is closed by a partition 12 which provides a support for motor and pumping pistons 20 and 22. A chambered block 13 provides a motor cylinder. A casing 9 supports a head block 15. A pumping cylinder is provided by a casing 14 mounted in the inner end of the head 15. The block 15 is divided into chambers 16 and 17 which chambers are controlled by inlet valves 18 and 19. A pumping piston 20 operates in the chamber 14 and is reciprocated by means of a piston rod 21 slidable in the partition 12. The piston rod carries a piston on its upper end which operates in the cylinder 13. Reciprocation of the piston 20 causes fluid to be drawn in through valves .18 and 19 and forced out through check valves 23 into the chamber 24 through which it is delivered to the surface of the well. The pumping mechanism so far described is similar in most respects to my patents No. 1,851,801 and No. 1,851,802, granted March- 29, 1932. The means for operating the motive piston 22, however, is difierent from those in the patents referred to and will now be described.

A pipe 25 through which pressure fluid is delivered for operating the motor is secured in a block 26. This block is provided with an axial bore providing a valve chamber in which is fitted a lining casing 27. The block 26 is provided with a bore 28 and a radial bore 29, the latter of which communicates with the interior of the casing 27. The block 26 has a block 30 secured 0 to its lower end, the block 30 having a cylindrical chamber 31 in which operates a piston 32. The upper end of the chamber 31 is closed by a plug 33, suitable packing plug 34 being provided to prevent leakage around the piston rod 35. The upper end of the rod 35 carries a valve 36 which controls passage of motive fluid from the port 29 to either of the passages 37 or 38 which lead respectively to the lower and upper ends of the chamber 13 on opposite sides of the motor piston 22. The block 30 is provided with m a valve chamber 39 in which moves a pilot valve 40 operated by a valve stem 41. The alve stem has spaced blocks or arms 42 and 43 which are engaged by the piston 22 at each end of its stroke for operating the pilot valve. This pilot valve controls passage of fluid from the port 28 to either of the ports 44 or .45 which lead into the chamber 31 above and below the piston 32 respectively. Through the lower end of the block 30 is threaded a pin 46 which serves as a To stop for the downward movement of the piston 32. Radial bores 47 and 48 provide exhaust passages from the chamber 27 to the outlet chamber 24.

In operation assume the parts in the position 7 shown in Figure 1. Motive fluid is supplied through the line 25 and ports 28, 29 and 45. Pressure below the piston 32 will raise this piston to open communication between the port 29 and the port 37. Motive fluid will then be supplied to the lower side of the piston 22 to move this piston upward to draw fluid in through the inlet valve 19 and to force fluid above the piston 20 out of the pumping chamber through port 23 into the chamber 24. When the piston 22 reaches approximately the limit of its stroke it engages the arm 42 and shifts the pilot valve 40 to uncover the port 44 above the piston .32 and to permit fluid below the piston 32 to exhaust through the port 45 into the chamber 24. Pressure above the piston 32 will force the piston down to the position shown in Figure 1 to open communication between port 29 and port 38 to supply motive fluid to the chamber 13 above the piston 22. Fluid below piston 22 may escape through the line 37 and port 47 into the outlet 24. Pressure will then be supplied to force the piston 22 downward to draw fluid in through valve 18 and to force it out of the chamber 17 and valve 23 into the outlet chamber 24. The 1 pump will continue operation so long as pressure fluid is supplied through the line 25. The pilot valve will be operated by the same motive fluid which operates the main pumping motor. The motor, valves and pump when assembled comprise a single compact unit the parts of which may be easily assembled and disassembled. and which is relatively simple and of such construction as to be almost impossible of getting, out of order.

In the modified form of valves shown in Figure 2 pressure fluid for operating the valves and motor is supplied through the chamber 49 which surrounds the outlet chamber 50. The chamber 49 may be open to pressure in the well so that the pump and the pilot valves may be operated from gas pressure in the well itself. From the chamber 49 fluid passes through ports 51 in a block 52 into the valve chambers 53 and 54 in the same manner in which they enter in the construction shown in Figure 1. The pumped fluid is discharged into the chamber 55 through which it passes through ports 56 in the block 52 and thence into the outlet passage 50. The pumping mechanism in Figure 2 is the same as that shown in Figure 1. The principal advantage secured by the construction of Figure 2 is that the pump may be operated by pressure gas in the well itself when such is available.

It will be obvious to those skilled in the art that various changes-may be made in my device .without departing from the spirit of the invention and therefore I do not limit myself to what is shown in the drawing and described in the specification, but only as indicated by the appended claims.

Having thus fully described my said invention, what I claim as new and desire to secure by Letters Patent, is:

1. A pump of the kind described comprising a casing having a block secured therein, a pumping chamber provided on one side of the block and a motor chamber on the other side, motor and pumping pistons mounted in their respective chambers, said pistons being connected by a common piston rod mounted in the said block, a source of fluid under pressure, means for conducting said fluid alternately to the opposite sides of said motor piston to operate it, a valve in control of the said fluid lines, a motor for operating the said valve, a pilot valve for operating the saidmotor, a valve stem operatively connected to the pilot valve, said stem having spaced abutments engageable by the main motor for shifting the pilot valve to deliver motive fluid to the main motor to drive it first in one direction and then in the other, substantially as set forth.

2. A deep well pump of the kind described comprising a casing having a partition block secured in one end, a motor cylinder casing mounted on the said block, a piston in said casing, a piston rod on said piston, said rod being connected at its other end to a pumping piston, a block secured in the upper end of said casing, said block having a chamber therein providing a valve for delivering motive fluid to operate the said piston, and a fluid motor for operating the said valve, said block also having a chamber therein providing a pilot valve, means connected to the pilot valve and operable by movement of the main piston for delivering motive fluid to the said valve operating motor, substantially as set forth.

3. In a deep well pump a casing, a valve block secured in said casing, a valve chamber in said block having a valve movable therein, a motor for operating said valve and a pilot valve in control of said motor, an outlet for fluid being pumped and an inlet for motive fluid, the motive fluid inlet surrounding the fluid outlet, substantially as set forth. v

a. A pump of the kind described comprising a pair of casings having a partition separating them, said casings being secured to the said partition, a pumping chamber provided on one side of the partition and a motor chamber on the other side, motor and pumping pistons mounted in their respective chambers, said pistons being connected by a common piston rod mounted in and passing through said partition, a source of fluid under pressure, a fluid line for conducting fluid alternately to the, opposite sides of said motor piston to operate it, a valve in control of said fluid line, a motor for operating said valve, a pilot valve for operating said motor, a valve stem connected to the said pilot valve, said stem having spaced abutments engageable by the main motor for shifting the pilot valve to deliver motive fluid to the main motor to drive it first in one direction and then in the other, substantially as set forth.

5. A deep well pump comprising a casing having a partition dividing it into two chambers, a motor cylinder mounted on the partition, a piston in said cylinder, a pumping cylinder mounted on the partition, a pumping piston in said cylinder, a common piston rod connecting said motor and said pumping pistons, a block secured in one end of said casing, said block having a chamber therein providing a valve for controlling motive fluid to operate the said piston and a fluid motor for operating the said valve, said block also having a chamber therein with a pilot valve mounted in the chamber, means connected to the pilot valve and operable by movement of the main piston for delivery of the motive fluid to the said valve operating motor, substantially as set forth.

1 CHARLES G. BOONE. 

